Surface treating machine



June 27, 1933. A. EmKssoN-JoNs 1,915,495

SURFACE ,TREATING MACHINE Filed Oct. 15, 1931 s Shets-Sheet 1 I m /& WM

fins ATTORNEY June 2?, 1933.. A. ERlKSSON-JONS 1,915,495

SURFACE TREATI NG MACHINE filed Oct. 15, 1951 5 Sheets-Sheet 2 ATTORNEYJune 27, 19330 A, ERmssoNuoNs I SURFACE TREATING MACHINE Filed Oct. 15,1931 3 Sheets-Sheet 5 INVENTOR & ATT g RfiY Patented tine 27 i333 rarerarea ANDEBS EEIKSSON-E'QNS, 9F STOCKHQLM, SWEDEN, ASSIGNOR T INVENTIA:EATENT- VERWERTUNGS-GESESCFT, 0F SCFHA'USEN, SWITZERLAND, A. CORPORA-TION 0F SWITZERLAND 1 SUBFACETREATING MACHINE Application filed Octcberis, 1931, Serial no.

invention relates to floor polishers and like machines for treatingsurfaces of various kinds. More particularly the invention relates tosurface treating machines such as floor polishers having a plurality,and pref-' erably three, rotatable elements contacting the surface to betreated. Still more particularly my invention relates. to the means fortranslating power from the power source, inch as the electricmotor, tothe driven memers.

The nature of my invention structurally and the advantage thereof willbecome apparent from a consideration of the following description takenin conjunction with the accompanying drawings forming a part of thisspecification and whereof: I

Fig. 1 is a side elevational view of a three- I disc floor polisherembodying the invention;

Fig. 2 is a front elevational view, partly in section, of the machineshown in Fig 1;

Fig. 3 is a schematic plan View of the driving and driven members ofthemachine.

shown in Figs. 1 and 2; a

Fig. 4 is in part a top plan view of the machine of Fig. 1 with themotor and easing removed and is, in part, taken on the line 'ing a motor4-4 of Fig. 5;

Fig. 5 is a partial vertical section taken on the line 5-5 of Fig. i;

Fig. 6 is a bottom plan view of a modified structure and is taken on theline 66 of Fig. 7; and

Fig. 7 is avertical section taken on the line 7--7 of Fig. 6.

Referring more particularly to Figs. 1-5, the floor polisher includes acasing 10 enclos- 11.- The usual commutator 12 and brush elements 13 arerovided. The .motor is disposed on a vertica shaft 20. The casing 10includes a lower ring shaped mem-- ber 14 in which the brush elementsare mounted. A cap 16 is provided for the casing 10 and thevariouscasing parts may be secured together in any suitable manner.

' Below the casing 10 is a frame plate 21 constituting the major part ofthe frame work of the apparatus. Frame plate 21 is provided with anupstanding flange 22. This flange 22 is circular and serves as a seatfor the ring 568,980, and in Germany October 23,1930. 7

14: of the motor casing, there being interposed and constitutes acovering for the driven sur- 7 face contacting members. The frame plate21 and the ring 14:: may be secured together in any desired manner as bybolts or rivets,

provided the nnder side of frame plate 21 is left as a smooth surface,at least for certain portions thereof, for reasons presently to beexplalned. In frame plate .21 and within flange 22 is an aperture 25within which is positioned the lower part of motor shaft 20 and a lowerbearing assembly 18 supporting the lower end of the motor shaft. Theball bearing assembly is'carried by a depending separate member 17 whichrests on ring 14.

Secured to frame plate 21 at 26 is a fixed support 27 having a ballbearing 28 comprising an inner iixed member 29 and an outer rotatablemember 30. The outer rotatable member is secured to a carrier orimplement disc 31 which is consequently mounted so that it can rotatebut which does not have radial movement. This disc is termed a carrierorimplement disc because it, so to speak, carries the brush disc or otherimplement 32. Brush disc 32 is detachably secured to carrier disc 31 bymeans such as snap spring arrangements 33 0f the type shown in copendingapplica tion Serial No. 286,663fi1ed June 19, 1928 by Axel. Olof Engberget .1., now Pat. No. 1,901,497, granted March 14 1933. implement disc 31may be said to be fixed or stationary relative to the framework since itrotates on a fixed axis.

Below and parallelto frame plate 21 is what may be termed a guide plate.Gu de plate 34 has an upper smooth surface WhlCh is disposed a givendistance from and parallel to the under smooth surface of frame platebearing 39, the outer race being secured to the carrier disc and theinner race being secured to a bearing spindle 40. Bearing spindle 40 issecured to the outer end of a yoke or U-shaped member 41.

Yoke 41 has side arms or fingers 42 which have upper and lower smoothbearing surfaces. These bearing surfaces of yoke 41 are parallel and arespaced apart substantially the same distance as the distance between thelower bearing surface of plate member 21 and the upper bearing surfaceof guide plate 34. The fingers 42, as shown in Fig. 4, are positionedbetween the members 21 and 34 and the yoke member 41 is of a width lessthan the distance between the two adjacent abutments 36 whereby themounting for this disc 37 is floating in the sense that the axis ofthedisc is capable of having undirected movement in a horizontal planeas well as rotational movement. The mounting however, preferably doesnot have vertical movement. Vertical movement would be possible sincethe weight of the apparatus is carried down through the brushes or othersurface treating members-to the floor and there is a reactionary thrustupwards of the yokes 41 against the under surface of the frame plate 21.It is preferred that there be a minimum of play between the top andbottom surfaces of member 41 and the bearing surfaces of parts 21 and 34respectively.

Each yoke 41 has a projection 43 with ahole therein in which one end ofa tension spring 44 is secured or hooked. The other end of each tensionspring 44 is secured to or hooked onto the framework as b being hookedaround a .pin 45 attached to frame plate 21. The arms or fingers 42 ofthe yokes 41 have parallel inner sides, and are rounded off at theirends to serve as guidesv for the springs 44 while preventing catching ofthe springs on the yokes.

Each carrier disc. has a circumferential smooth surfaced tire,'hoop orring 46 the outer surface of which is a c lindrical contact surface.Surrounding the ll iwer end of shaft 20 and secured thereto is acylindrical member 47 which, as one example, may be made of steel. Iterm this member the driving member. It will be understood that thismember may be one piece with theshaft 20. The springs 44 are sopositioned that they y discs 37 and draw the discs 37 and 38 eachagainst the driving member 47 on the one hand and dlSC 31 on the otherhand. Referring to Fig. 3, it will be seen that if the driving member 47rotates in a clockwise direction, discs 37 and 38 are both driven incounter-clockwise direction, whereas disc 31 is driven in clockwisedirection. This provides the advantage that one of the discs is rotatedin opposite direction to the other disc. Consequently the brushes orother tools can be shifted so that they operate first in one directionand then in the other direction. This increases the life of brushes.Again referring to Fig. 3, it will be seen that each spring 44 isarranged in a line which bi-sects the angle formed by those radii of themovable disc to which the respective spring is attached which extend tothe points of contact with the dr ving member 47 and the fixed disc 31respectively. The spring 44 must obviously be strong enough to providesufiicient contact between the rotating members to drive the carrierdiscs from the driving member 47. It will be seen that the axes of thediscs 37 and 38 are parallel to the axis of disc 3]. but have relativemovement thereto and relative move: ment to each other within the limitsdetermined by the strength of springs 44 and the abutments formed by thespacers 36. It will be evident that the driving member drives discs 37and 38 directly and that disc 31 is indirectly driven through the discs3'? and 38. Discs 37 and 38 are therefore intermedia-tely disposed discswith respect to the driving member and the fixed disc.

Under certain circumstances it may be advisable to provide the drivingmember 47 with a friction surface of rubber and one or more of thecarrier discswith steel rims or all the rims may be of metal or othermaterial. I believe, however, that the best results are obtained byusing a metal driving member and tires of rubber, leather or similarmaterial for the discs. The floor polisher has a handle 9 for guidingthe same.

Referring now to Figs. 6 and 7, these figures show a modified mountingfor the brush member 41, this arrangement includes a plate havingU-shaped slots 76 and 77 formed in theends thereof. The member 75 iswidened bilaterally as indicated at 74 and supporting studs or pins 78are secured to the extended portions to serve as anchors for a pair ofsprings 52. These springs are secured to or hooked around similar studs79 secured to a plate 80 which may be substantially coextensive with thedisc member, and which is secured to the frame plate 21 by suitablemeans such as screws or bolts 81. The plate or disc 75 is slightlydished at the center and apertured to, receive the bearing spindle 40. Awasher 82 provides a gripping member for 38. Instead of the yoke shapedlimited by the relative the nut which secures the bearing spindle 41 inposition on the plate 75. The splate 80 is suitably apertured to receivethe nut 83 and the upper end of the bearing spindle.

Round plates 87 aresecured to plate 80 by.

screws 85 being separated therefrom by washers 86. The washers 86 are ofconsiderably less outer diameter than the width of the slots 76 and 77.The slotted ends of member 75 have movement between the upper surfacesof plates 87 and the lower surface of plate 80, the movement thereofbeing size of the slots 76 and 77 and the washers 86.respectively. Thesprings 52 pull the plate 75 and therefore the carrier disc 37 intocontact with thedriving member 47 and the stationary carrier disc 31.

The construction shown in Figs. 6 and 7 permits considerable oscillatorymovement of the carrier disc. This modified construction may be ofparticular use in certain forms-of work where a large degree of freedomis desirable for the polishing or cleaning members.

In the surface treating machine above described, the floating discscanautomatically adjust themselves with respect to the driving memberindependently of the relation to other driven discs. It will be seenthat good friction contact is obtained at all times with a decidedlysimple construction. A great advantage afi'orded by the invention isthatthe gear ratio between the driving motor and the driven discs can behigh., This is advan tageous for operation and has not been possiblewith floor polishers previously known. Furthermore, silent powertransmission 15 possible. Furthermore, the advantages of the three-discfloor polisher are obtained in the Y axis,

interchangeability of the brush members and the overlap of areascontacted by the respective brush elements.

1 While I have described a preferred means for carrying out theinvention, it will be understood that the invention is adaptable toembodiment in a vari ty of structures and I am not to be limited to anyparticular structure except as defined by the appended claims taken inconnection with the state of the prior art. What I claim is I 1. In amachine of the character set forth, a first implement disc, means forrotatably mounting said disc on a fixed vertical axis, a driving member,means for rotatably mountin said drivingmember on a fixedverticaltatably mounting said second implement disc on a floatingvertical axis, and means for resecond implement disc in driving relationwith said driving member and said first im lement disc so that thesecond implement time is directly driven by the driving member and inturn rotates the first'implement disc.

a second implement disc, means for ro-' mounting said driving member ona fixed Y vertical axis a second lmplement disc, means for rotatablymounting said second implement disc on a floating vertical axis, andtension means for retaining said second implement dlsc in drlvlngrelation with said drlving member and said first lmplement disc so thatthe second implement disc is t directly driven by the driving member-andin turn rotates the first implement disc.

3. In a machine of the character set forth, a first implement disc,means for rotatably mounting said disc on a fixed vertical axis, adriving member, means for rotatably mounting said driving member on afixed vertical axis, a second implement disc, means for rotatablymounting said second implement disc on a floating vertical axis, andelastic means for urging said second implement disc into frictionalengagement with said driving member and said first implement disc-sothat the second implement disc is directly driven by thedriving memberand in turn rotates the first implement disc.

4. In a machine of the character set forth,

a first implement disc, means for rotatably 6. In a machine of thecharacter set forth,

a first implement disc, means for rotatably mounting said disc on afixed vertical axis, a driving member, means for rotatably mounting saiddriving member on a fixed vertical axis, a second implement disc, meanscomprisin a yoke and guide means therefor for rotata 1y mounting saidsecond implement disc on a floating vertical axis, and tenslon meansacting on said yoke for retain mg said second implement dlsc 1n drivingrelation with said driving member and said 7 first implement disc sothat the second implement disc is directly driven by the rdriving memberand in turn rotates the first implement disc.

6. In a machine of the character set forth, a first implement disc,means for rotatably mounting said disc on a fixed vertical'axis, adriving member, means for rotatably mounting said vertical axis, asecond implementdisc, means driving member on a fixed for rotatablymounting said second implement disc on a floating vertical axis, andmeans for retaining said second implement disc in circumferentialcontact with said driving member and said first implement disc so thatthe second implement disc is directly driven by the driving member andin turn rotates the first implement disc. 7

p 7 In a machine of the character set forth, a first implement disc,means for rotatably mounting said disc on a fixed vertical axis, adriving member, means for rotatably mounting said driving member on afixed vertical axis, a plurality of intermediately disposed rotatablediscs and means for retaining each of said intermediately disposed discsin friction'al driving contact with said driving member and said firstimplement disc whereby the driving member and said first implement discare rotated in the same given direction and the intermediately disposeddiscs are rotated in the same direction with respect to each other butoppositely with respect to the driving member and first implement disc.

8. In a machine of the character set forth, a first implement disc,means for rotatably mounting said disc on a fixed vertical axis, adriving member, means for rotatably mounting said driving member onafixed vertical axis, a plurality of intermediately disposed discs, meansfor rotatably mounting said intermediately disposed discs on floatingvertical axes, and means for retaining each of said intermediatelydisposed discs in frictional driving relation with said driving memberand said, first implement disc whereby the driving member and said firstimplement disc are rotated in the same given direction and theintermediately disposed discs are rotated in the same direction withrespect to each other but oppositely with respect to the driving memberand first implement disc.

9. In a machine of the character set forth,

a first implement disc, means for rotatably' mounting said disc on afixed vertical axis, a driving member, means for rotatably mounting saiddriving member of a-fixed vertical axis,.a plurality of intermediatelydisposed discs, means for rotatably mount, ing said intermediatelydisposed discs on floating vertical axes, and resilient means forretaining each of said intermediately disposed discs in circumferentialfrictional contact with said drivin member and said first implement discwhere y the driving memberand said first implement disc are rotated inthe same given direction and the intermediately disposed discs arerotated in the same direction with respect to each other but oppositelywith respect to the driving member and first implement disc.

10. In a machine of the character set forth, a first implement disc,means for rotatably mounting said disc on a fixed-vertical axis,

'V ,.i1'sposed discs, "s a id'inter'mediatelydisposeddiscs on fioatiing'verticalfaxes, andtension springs for a ...driving mounting saiddriving,"member*on; a' fixed .ti'cal"=ax-'is, apluralityofintermediately means for rotatably-mounting 'firging' each ofsaid intermediately-disposed "discs-into frictional contact with saiddriving member and said first implement disc where- -.-bythedriving'member and said first implement disc are rotated in the samegiven=direction and the intermediately disposed discs are rotated in thesame direction with respect to each other but oppositely with respect toshe driving member and first implement isc.

11. In a machine of the character set forth, a first implement disc,means mounting said disc on a fixed vertical axis, a driving member,means for rotatably for rotatably member, means for rotatably mountingsaid driving member on'a fixed vertical, axis, a'plurality ofintermediately disposed discs, means comprising spaced guide plates andmembers guided therebetween for rotatably mounting said intermediatelydisposed discs on floating vertical axes, and tension springs forretaining each of said intermediately disposed discs into directfrictional contact with said driving member and said first implementdisc whereby the driving member and said first implement disc arerotated in the same given direction and the intermediately disposeddiscs are rotated in the same direction with respect to each other butoppositely with respect to the driving member and first implement disc.

12. In a machine of the characterset forth, afirst implement disc, meansfor rotatably mounting said disc on a fixedvertical axis, a drivingmember, means for rotatably mounting said driving member on a fixedvertical axis, a plurality of intermediately disposed rotatable discsand means formtaming each of said intermediately disposed discs infrictional driving relationwith said driving member and said firstimplement disc whereby the driving member and said first implement discare rotated in the same given direction and the intermediately disposeddiscs are rotated in the same direction with respect to each other butoppositely with respect to the driving member and first implementdisc,each of said retaining means comprising spring means acting in a linebetween the radii from the center of the respective intermediatelydisposed discs to the points of contact thereof with the driving memberand said firstimplement disc respectivelv.

13. In a machine of the character set forth, a framework, a firstimplement disc. means for rotatably mounting said disc in said frameworkon a fixed vertical axis, a driving member, means for rotatably mountingsaid driving'member in said framework on a fixed vertical axis, apluralty of intermediately disposed rotatable discs, means for mountingsaid intermediately disposed discs in said framework on floatingvertical axes comprising spaced members and supporting means guidedthereby, and means for retaining each of said intermediately disposeddiscs in frictional driving relation with said driving member and saidfirst implement disc whereby the driving member and said first implementdisc are rotated in the same given direction and the intermediatelydisposed discs are rotated in the same direction with respect to eachother but oppositely with respect to the driving member and firstimplement disc, each of said retaining means comprising a spring actingin a line between the radii from the center of the respectiveintermediately disposed discs to the points of contact thereof with thedriving member and said first implement disc respectively. I

14. A surface treating machine comprising a framework, a driving membermounted on said framework to rotate about a fixed vertical axis, meansfor rotating said driving member, a first implement disc mounted on saidframework to rotate about a fixed vertical axis, a second implement discrotatably mounted on a. floating vertical axis, means for supportingsaid floating axis on said framework so that the former may .haveundirected movement in a horizontal lane, and means for urging saidsecond implement disc into frictional engagement with said drivingmember and said first implement disc.-

15. A surface ing a framework, a driving member mounted on saidframework to rotate about a fixed vertical axis, means for rotatingsaiddriving member, a first implement disc mounted on said framework torotate about a fixed vertical axis, a second implement disc rotatablymounted on a floating vertical axis, means for supporting saidfloatingaxis on said framework so that the former may have undirectedmovement in a horizontal plane, and tension means for urging said secondimplement disc into. frictional engagement with said driving member andsaid first implement disc.

16. A surface treating machine comprising a framework, a driving membermounted on said framework'to' rotate about a fixed vertical axis,meansfor rotating said driving member, a first implement disc mounted onsaid framework to rotate about a fixed vertical axis, a-second implementdisc rotatably mounted on a floatin vertical axis, means for supportingsaid oating axis on said framework so that the former may haveundirected movement in a horizontal plane, and elastic means for urgingsaid second implement disc into frictional engagement with treatingmachine comprisframework so that the former may have undirected movementin a horizontal plane while being restrained from movement in a verticaldirection, and means for urging said second implement disc intofrictional engagement with said driving member and said first implementdisc.

In testimony whereof I hereunto afiix my signature.

ANDERS )ERIKSSON-JONS.

